How to Restore DR database from RMAN

Dear DBA-Mates,

We would like to share some rough work for "How to Restore DR database" which can be helpful here for quick reference.

First we need to set the value for log_archive_dest_state_2 paramater as shown below in Primary Node.

In Primary Seerver:

SQL>alter system set log_archive_dest_state_2=DEFER sid='*';

Now, we should Physically check all the archive, once the full backup completed, as is available either in primary or in standby.

Then disable the archive purge cronjob in standby.

Also, Stop if any 3rd party snapsync jobs is running. In our case we don't have any.

Now, we will login to Standby and will start restore:

1. We will restore controlfile from production backup controlfile.

Login rman as:

$rman target /

rman>

restore standby controlfile from  '/rmanbk01/ora-data/backup/PRD_20180621_1919_1_CONTROL';

rman>

2. Start database in mount stage:

rman>alter database mount;

3. Start recovering from catalogs.

rman>catalog start with '/rmanbk01/PRD/backup/';

4. Restore the database.

rman>RUN

{

ALLOCATE CHANNEL c1 DEVICE TYPE disk;

ALLOCATE CHANNEL c2 DEVICE TYPE disk;

ALLOCATE CHANNEL c3 DEVICE TYPE disk;

ALLOCATE CHANNEL c4 DEVICE TYPE disk;

ALLOCATE CHANNEL c5 DEVICE TYPE disk;

ALLOCATE CHANNEL c6 DEVICE TYPE disk;

ALLOCATE CHANNEL c7 DEVICE TYPE disk;

restore database;

release channel c1;

release channel c2;

release channel c3;

release channel c4;

release channel c5;

release channel c6;

release channel c7;

}

5. Once restore completed, we can check archive and start the catalog.

rman>catalog start with  'path/archivelog';

6. Now, we can start the MRP process as shown below:

rman>alter database recover managed standby database disconnect;

7. From below Query, we can monitor the restore process.

select SID,OPEN_TIME, (sysdate-open_time)*24*60 ela_time,close_time,filename,

(TOTAL_BYTES/1024/1024/1024) GBTOBEREAD,(bytes)/1024/1024/1024 GB_sofar  from V$BACKUP_ASYNC_IO where filename like '/path/datafile%';

Some more useful links:

How to run SQLT for a sqlid in Oracle

ORA-07391:sftopn: fopen error, unable to open text file

RMAN Issues And Solutions Troubleshooting

Database Prechecks Script before clone
Regards,